mirror of
https://github.com/urbit/shrub.git
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156 lines
3.3 KiB
Plaintext
156 lines
3.3 KiB
Plaintext
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/+ trad
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=, trad-lib=trad
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|* [state-type=mold command-type=mold]
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|%
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::
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:: The form of a tapp
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::
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++ tapp-core
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$_ ^|
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|_ [bowl:gall state-type]
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++ handle-command
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|~ command-type
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*form:tapp-trad
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--
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::
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++ trad-lib (^trad-lib sign card)
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++ trad trad:trad-lib
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::
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:: Possible async calls
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::
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+$ card
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$% [%hiss wire ~ %httr %hiss hiss:eyre]
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==
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::
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:: Possible async responses
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::
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+$ sign
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$% [%sigh =httr:eyre]
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==
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+$ move (pair bone card)
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++ tapp-trad (trad state-type)
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+$ tapp-state
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$: waiting=(qeu command-type)
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active=(unit eval-form:eval:tapp-trad)
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app-state=state-type
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==
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++ helpers
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=, trad-input=trad-input:trad-lib
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|%
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++ just-do
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|= =card
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=/ m (trad ,~)
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^- form:m
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|= trad-input
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[[/ card]~ ~ %done ~]
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::
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++ send-hiss
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|= =hiss:eyre
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=/ m (trad ,~)
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^- form:m
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(just-do %hiss / ~ %httr %hiss hiss)
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::
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++ expect-sigh
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=/ m (trad ,httr:eyre)
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^- form:m
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|= =trad-input
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?~ trad-input
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[~ ~ %wait ~]
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?: ?=(%sigh -.u.trad-input)
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[~ ~ %done httr.u.trad-input]
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~| [%expected-sigh got=-.u.trad-input]
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!!
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--
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++ create-tapp
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|= handler=tapp-core
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|_ [=bowl:gall tapp-state]
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++ this-tapp .
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::
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:: Start a command
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::
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++ poke-noun
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|= command=command-type
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^- (quip move _this-tapp)
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=. waiting (~(put to waiting) command)
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?^ active
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~& [%waiting-until-current-trad-finishes waiting]
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`this-tapp
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start-trad
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::
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:: Pass response to trad
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::
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++ sigh-httr
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|= [=wire =httr:eyre]
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^- (quip move _this-tapp)
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(take-trad `[%sigh httr])
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::
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:: Failed http request
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::
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++ sigh-tang
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|= [=wire =tang]
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^- (quip move _this-tapp)
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(fail-trad %failed-sigh tang)
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::
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:: Continue computing trad
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::
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++ take-trad
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|= =trad-input:trad-lib
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^- (quip move _this-tapp)
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=/ m tapp-trad
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?~ active
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~| %no-active-trad !!
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=^ r=[moves=(list move) =eval-result:eval:m] u.active
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(take:eval:m u.active ost.bowl /trad trad-input)
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=> .(active `(unit eval-form:eval:tapp-trad)`active) :: TMI
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=^ moves=(list move) this-tapp
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?- -.eval-result.r
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%next `this-tapp
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%fail (fail-trad err.eval-result.r)
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%done (done-trad value.eval-result.r)
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==
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[(weld moves.r moves) this-tapp]
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::
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:: Called on trad failure
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::
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++ fail-trad
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|= err=(pair term tang)
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^- (quip move _this-tapp)
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%- (slog leaf+"tapp command failed" leaf+(trip p.err) q.err)
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finish-trad
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::
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:: Called on trad success
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::
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++ done-trad
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|= state=state-type
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^- (quip move _this-tapp)
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~& %trad-done
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=. app-state state
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finish-trad
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::
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:: Called whether trad failed or succeeded
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::
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++ finish-trad
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^- (quip move _this-tapp)
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=. active ~
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=. waiting +:~(get to waiting)
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start-trad
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::
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:: Try to start next command
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::
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++ start-trad
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^- (quip move _this-tapp)
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?. =(~ active)
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~| %trad-already-active !!
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=/ next=(unit command-type) ~(top to waiting)
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?~ next
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`this-tapp
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=. active
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:- ~
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^- eval-form:eval:tapp-trad
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%- from-form:eval:tapp-trad
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^- form:tapp-trad
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(~(handle-command handler bowl app-state) u.next)
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(take-trad ~)
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--
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--
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